人心隔肚皮
    人心隔肚皮
    人心隔肚皮
      Explanation: Difficult to guess that the person's mind.
      Source: Qing Qian Cai, "said Yue Fei," The Fourth: "Butch bear riding, people across the belly. Confidant of things will break, and make known that!"
      Examples: However, ~, some thing, how can I think of it. ★ liang "Cao"